ML13330A125
| ML13330A125 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/29/1980 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Dietch R SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8010010639 | |
| Download: ML13330A125 (5) | |
Text
AMOCONUH DOCKET HUMEPY"'
(WEkRAil C;
NSIC Local PDR RPurple ORB#5 Reading TNovak Docket No. 50- M NRR Reading RTedesco AUG 2 1980 DEisenhut JO1shinski GLainas Gray File OELD
.XtraCy (6)
Mr. R. Dietch OI&E (3)
Vice President DCrutchfield Nuclear Engineering and Operations TWambach Southern California Edison Company SNowicki 2244 Walnut Grove Avenue HSmith Post Office Box 800 ACRS (16)
Rosemead, 'California 91770
Dear Mr. Dietch:
We have been reviewing the failure of the San Onofre Unit No. 1 Salt Water Cooling System on March 10, 1980, and your transmittals on the subject dated July 24, and August 8, 1980 and find that we need further information to properly evaluate the significance of the event. We, therefore, ask that you provide the following information:
- 1. The supporting calculations and data used in determining the time and temperature limits cited in the response. Of particular interest is the basis for the 200OF limit indicated for the component cooling water system. Equipment design limitations should be explicitly referenced.
- 2. The following information regarding the desiccant in the compressed air system referenced in the response to Question 2.B:
- a.
When the desiccant presence was identified.
- b. Any evaluations performed to determine the effects of the desiccant on equipment performance; particularly common mode failures, and/or the extent of the contamination.
- c. Any actions taken to remove the desiccant and prevent recurrence of the contamination.
- d. 'A list of safety-related equipment presently supplied by the compressed air system. Those pieces of equip ment where the desiccant contamination has been identified should also be noted.
- 3. Any plans to extend the preventative maintenance programs to areas outside the saltwater cooling system.
Please provide the above information within 20 days of your receipt of this letter. After we have evaluated your response to the above request, we would like to meet with your staff to discuss the analysis in more detail.
G. C. Lainas, Assistant Director for Safety Assessment Division of Licensing cc:
See page OFFICE
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VERNMENT PRINTING OFFICE
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GOVERNMENT PRINTING OFFICE: 1 979-289-369
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 August 29, 1980 Docket No.
50-244 Mr. R. Dietch Vice President Nuclear Engineering and Operations Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770
Dear Mr. Dietch:
We have been reviewing.the failure of the San Onofre Unit No. 1 Salt Water Cooling System on March 10, 1980, and your transmittals on the subject dated July 24, and August 8, 1980 and find that we need further information to properly evaluate the significance of the event. We, therefore, ask that you provide the following information:
- 1. The supporting calculations and data used in determining the time and temperature limits cited in the response. Of particular interest is the basis for the 200OF limit indicated for the component cooling water system. Equipment design limitations should be explicitly referenced.
- 2. The following information regarding the desiccant in the compressed air system referenced in the response to Question 2.B:
- a. When the desiccant presence was identified.
- b. Any evaluations performed to determine the effects of the desiccant on equipment performance; particularly common mode failures, and/or the extent of the contamination.
- c. Any actions taken to remove the desiccant and prevent recurrence of the contamination.
- d. A list of safety-related equipment presently supplied by the compressed air system. Those pieces of equip ment where the desiccant contamination has been identified should also be noted.
8001010
-2
- 3. Any plans to extend the preventative maintenance programs to areas outside the saltwater cooling system.
Please provide the above information within 20 days of your receipt of this letter. After we have evaluated your response to the above request, we would like to meet with your staff to discuss the analysis in more detail.
G. C. Lainas, Assistant Director for Safety Assessment Division of Licensing cc:
See page 3
Mr. R. Dietch
-3 cc:
Charles R. Kocher, Assistant Director, Technical Assessment General Counsel Division Southern California Edison Company Office of Radiation Programs Post Office Box.800 (AW-459)
Rosemead, California 91770 U. S. Environmental Protection Agency David R. Pigott Crystal Mall #2 SSamuel B. Casey Arlington, Virginia 20460 Chickering & Gregory Three Embarcadero Center U. S. Environmental Protection Twenty-Third Floor Agency San Francisco, California 94111 Region IX Office ATTN:
EIS COORDINATOR Jack E. Thomas 215 Freemont Street Harry 3. Stoehr San Francisco, California 94111 San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Resident Inspector c/o U. S. NRC P. 0. Box AA Oceanside, California 92054 Mission Viejo Branch Library 24851 Chrisanta Drive Mission Viejo, California 92676 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 California Department of Health ATTN: Chief, Environmental Radiation Control Unit Radiological Health Section 714 P Street, Room 498 Sacramento, California 95814